This is what screws in to the Magura master cylinder that is attached to the slave cylinder I'm using on Hackjob. But I'm using a Ducati master instead which uses a standard 10mm brake bolt and banjo fitting.
Its similar to an inverted flare like I've seen on auto brake lines, but the tip is perfectly flat rather than tapered. The threads are non-tapered 10mm of unknown pitch. Its finer than the 1.25 pitch brake bolts I have to compare to, but that's all I know.
So, anyone familiar with this style of fitting?